One person has died after an 18-wheeler cab jumped a guard rail on Interstate 45 on Thursday night and plummeted to the ground below, Dallas police said.

The accident happened around 9 p.m. on I-45 and Overton Road in Oak Cliff, shutting down all but one lane on the northbound side of the highway, according to Dallas police. The driver of the 18-wheeler died in the accident.

Four children riding on an inner tube on Joe Paul Lake were injured Sunday night when another boat slammed into them, Grand Prairie police said.

An 8-year-old boy was taken to Children’s Hospital in Dallas in critical condition. A 4-year-old is also at Children’s and in stable condition. Two other children on the inner tube suffered minor injures and didn’t go to the hospital. All of the children were wearing life jackets, police said.

Grand Prairie police spokesman Lyle Gensler said that police were still investigating the accident, where occurred around 8:40 p.m. Sunday.

Arlington police are investigating a double shooting in a home that left a woman and a man dead this morning.

Officers responded around 5:15 a.m. to the 6800 block of Biondi Trail and found two people shot. Police spokeswoman Tiara Ellis Richard said that the woman was taken to Methodist Mansfield Medical Center, where she died. The man was taken to John Peter Smith Hospital in Fort Worth in critical condition and later died. Their names haven’t been released.

Richard said that the shooting appears to be a domestic dispute, and the woman’s teenage son and adult daughter were at the home but not injured.

Arlington police remain on the scene of a shooting that left 2 wounded this morning. No word on their conditions. pic.twitter.com/Hhfm8KvtxK

A Southern Methodist University student has been charged in connection with a sexual assault of another student Sunday.

SMU police arrested 19-year-old John David Mahaffey on Tuesday and booked him into the Dallas County Jail. He posted $25,000 bond Wednesday.

The incident on Sunday, which occurred at 3050 SMU Blvd. and in the Airline Parking Garage nearby, was fourth sexual assault reported on or near the campus this year. The victim said that the he was assaulted by a male acquaintance. The Sigma Phi Epsilon fraternity is at 3050 SMU Blvd.

SMU spokesman Kent Best said that Mahaffey, a sophomore from Springfield, Mo., is temporarily banned from the campus pending further investigation. The SMU Daily Campus reports that Mahaffey comes a family with a long history at the university. His great-great-grandfather served on the school’s founding committee, according to the newspaper.

Dallas police Chief David Brown said Saturday that changes made to how 911 calls are classified should save lives and prevent the low-priority response given to a recent call in which a woman was heard being choked and pleading for her life.

Brown said that 911 operators can now categorize serious calls more quickly to inform responding officers of their urgency. In Deanna Cook’s 911 call earlier this month, she could be heard pleading for help but Dallas police officers responded 50 minutes after the call came in and left the house when no one answered the door.

The operator wrote “urgent!” in a note to dispatchers but didn’t relay critical information about Cook’s life being in danger.

“Our job is to serve and protect life, and that didn’t happen,” Brown said at a South Dallas crime meeting with community members Saturday morning.

Brown said that the 911 operator who took Cook’s call tried to escalate it to a “Code 3″ police response, meaning a response with lights and sirens blaring. For some reason, she didn’t succeed, Brown said.

“[The 911 operator] obviously failed at that, and it cost the life of Ms. Cook,” he said. “The correction we immediately made will ensure that this will never happen again.”

The two new 911 call classifications now put the highest priority on calls like the one Cook made. Brown’s comments Saturday were the most detailed yet he’s made in public about the botched handling of the 911 call and the officers’ response.

Update at 10 p.m.: The tattoo you see here is all Dallas Police have to go by as detectives attempt to identify the woman found the park last night. DPD dispatched the photo tonight, along with the note it needs the public’s help: “Investigators are unable to [identify] this complainant and request the public’s assistance.”

Per the DPD tonight, the cause of death remains unknown at present; the department awaits the results of a Dallas County Medical Examiner’s autopsy. Comes the request: “Dallas Homicide Detectives are asking that if anyone recognizes this tattoo to please contact Detective Shinn at 214-671-3605.”

Original item posted at 9:43 a.m.: A couple walking in a park near South Dallas Friday night found a woman’s body floating in a pond, Dallas police said.

The woman, who has not been identified, was found in William Blair Park in the 3000 block of Rochester Street. Her cause of death is pending an autopsy, police said.

A 32-year-old man was shot to death inside a car on a Pleasant Grove street Saturday morning, Dallas police said.

Police responded to shooting call shortly before 6 a.m. in the 1400 block of Mission Hills near C.F. Hawn Freeway and found Tory Fuller dead inside a car. He had been talking to a woman in the car when a man came up to them, argued with Fuller and shot him several times, police said.

A Dallas police spokesman said the two men had an ongoing argument that started earlier this week. Police have not located the suspect.

Former Dallas City Councilwoman Sandra Crenshaw, who was arrested Friday on suspicion of felony theft, was being held Saturday at the Dallas County jail on $500 bond.

Dallas police took Crenshaw into custody at the downtown library Friday at 5 p.m. on an outstanding felony warrant of theft involving a rental vehicle. The alleged offense is a state jail felony punishable by up two years in jail.

The charge shows the theft was valued between $1,500 and $20,000.

Crenshaw was first placed in a squad car Friday, but she soon complained of having a panic attack. Dallas Fire-Rescue paramedics then loaded her onto a stretcher and took her to a hospital. She was booked into jail around 11:30 p.m.